When Completely Fair Scheduler bandwidth control is in use, this parameter controls the amount of run-time (bandwidth) transferred to a run queue from the task's control group bandwidth pool. Small values allow the global bandwidth to be shared in a fine-grained manner among tasks, larger values reduce transfer overhead.

The default value is 5000

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Adjacent Cache Line Prefetch

This BIOS option allows 2 options: "Enabled" and "Disabled".

This prefetcher always collects cache line pairs (128 bytes) from the main memory, providing that the data is not already contained in the cache. If this prefetcher is disabled, only one cache line (64 bytes) is collected, which contains the data required by the processor.

This prefetcher is a L1 data cache prefetcher, which detects multiple loads from the same cache line done within a time limit, in order to then prefetch the next line from the L2 cache or the main memory into the L1 cache based on the assumption that the next cache line will also be needed.

Default setting is "Enabled".

DDR PowerDown and idle counter

This BIOS switch allows 2 options: "BIOS" and "PCODE".

This feature determines whether BIOS or hardware will control DDR powerdown modes and idle counter. When "PCODE" is selected, hardware algorithm controls the modes. When "BIOS" is selected BIOS controls the modes.

This feature will opportunistically lower the turbo frequency to increase energy efficiency. If this option is disabled, turbo frequency will remain constant.

Default setting is "Auto".

Fan Control

This BIOS option allows 2 options: "Auto" and "Full".

The default setting is "Auto", which allows the system to control the fan speed according to the system temperature. If "Full" is selected, the system runs fans at 100% speed and it may improve the system performance. But it increases the power consumption of the system.

Default setting is "Auto".

Hardware Prefetcher

This BIOS option allows 2 options: "Enabled" and "Disabled".

This prefetcher looks for data streams on the assumption that if the data is requested at address A and A+1, the data will also presumably be required at address A+2. This data is then prefetched into the L2 cache from the main memory.

Default setting is "Enabled".

Hyper-Threading

This BIOS option enables or disables additional hardware thread which shares same physical core. Generally "Enabled" is recommended but disabling it makes sense for the application which requires the shortest possible response times.

Intel(R) SGX is a CPU extension that applications can use to create and access private memory areas. When "Disabled" is selected, SGX is disabled and cannot be used by applications. When "Enabled" is selected, SGX is enabled and can be used by applications. The reserved size of the private memory is specified by the BIOS. When "Software Controlled" is selected, SGX is enabled and can be used by applications. The reserved size of the private memory is specified by the operating system (OS).

Default setting is "Software Controlled".

VT-d

This BIOS option enables or disables I/O virtualization functions of the CPU.
If the server is not used for virtualization, this option should be set to "Disabled".